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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A263819 Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having index change (+-,+-) 0,0 0,1 0,2 or 1,0.

Table of values

n a(n)
1 121
2 11305
3 643905
4 31916832
5 1746531193
6 96761217077
7 5280184936704
8 288410304823557
9 15799152314227457
10 865337374046219193
11 47384715752967787849
12 2595217499912210034105
13 142150854161945612453920

List of values

[121, 11305, 643905, 31916832, 1746531193, 96761217077, 5280184936704, 288410304823557, 15799152314227457, 865337374046219193, 47384715752967787849, 2595217499912210034105, 142150854161945612453920]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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